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All results from a given calculation for SiH2F2 (difluorosilane)

using model chemistry: wB97X-D/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/LANL2DZ
 hartrees
Energy at 0K-204.808842
Energy at 298.15K 
HF Energy-204.808842
Nuclear repulsion energy49.232330
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at wB97X-D/LANL2DZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2335 2335 58.48 172.56 0.11 0.19
2 A1 964 964 131.63 24.04 0.69 0.82
3 A1 767 767 56.27 6.97 0.15 0.26
4 A1 276 276 26.59 2.13 0.74 0.85
5 A2 705 705 0.00 23.41 0.75 0.86
6 B1 2359 2359 118.32 47.38 0.75 0.86
7 B1 680 680 131.02 8.48 0.75 0.86
8 B2 938 938 258.23 8.23 0.75 0.86
9 B2 824 824 31.24 8.11 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4923.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4923.9 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at wB97X-D/LANL2DZ
ABC
0.73996 0.23462 0.19083

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/LANL2DZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.482
F2 0.000 1.345 -0.515
F3 0.000 -1.345 -0.515
H4 1.250 0.000 1.263
H5 -1.250 0.000 1.263

Atom - Atom Distances (Å)
  Si1 F2 F3 H4 H5
Si11.67451.67451.47311.4731
F21.67452.68932.55552.5555
F31.67452.68932.55552.5555
H41.47312.55552.55552.4990
H51.47312.55552.55552.4990

picture of difluorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 Si1 F3 106.842 F2 Si1 H4 108.398
F2 Si1 H5 108.398 F3 Si1 H4 108.398
F3 Si1 H5 108.398 H4 Si1 H5 116.041
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 1.243      
2 F -0.524      
3 F -0.524      
4 H -0.097      
5 H -0.097      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 3.038 3.038
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.463 0.000 0.000
y 0.000 -28.281 0.000
z 0.000 0.000 -22.159
Traceless
 xyz
x 3.757 0.000 0.000
y 0.000 -6.470 0.000
z 0.000 0.000 2.713
Polar
3z2-r25.426
x2-y26.818
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.731 0.000 0.000
y 0.000 2.688 0.000
z 0.000 0.000 2.606


<r2> (average value of r2) Å2
<r2> 59.540
(<r2>)1/2 7.716